#define BLYNK_TEMPLATE_ID "TMPL3Ikv59TXh"
#define BLYNK_TEMPLATE_NAME "SMART MEDICINE DISPENSER"
#define BLYNK_AUTH_TOKEN "WazMMwSp-W_OHpDvGvYfbzQ4r6ztCezf"

//Initialization of header file
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>
// Initialization of header file
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo medicineserve;

// SSID and password of WiFi
char ssid[] = "Wokwi-GUEST";
char password[] = "";

const int buzz = 34;
const int led = 12;
const int servopin = 25;
const int button = 35;
bool lastButtonState = HIGH;
float level = 100;
const float dispense = 5;    // debounce delay time in ms

void setup() {
  Serial.begin(115200);
  pinMode(buzz, OUTPUT);
  pinMode(led, OUTPUT);
  pinMode(button, INPUT_PULLUP);
  lcd.init();
  lcd.backlight();

  // Connecting to WiFi
  Serial.println("Connecting to WiFi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Attempting to connect WiFi");
  }
  Serial.println("Connected to WiFi");

  // Connecting to Blynk
  Serial.println("Connecting to Blynk");
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, password);
  while (!Blynk.connected()) {
    delay(1000);
    Serial.println("Attempting to connect Blynk");
  }
  Serial.println("Connected to Blynk");

  medicineserve.attach(servopin);
  medicineserve.write(0);

  lcd.setCursor(0, 0);
  lcd.println("Medicine Level:");
  lcd.setCursor(0, 1);
  lcd.println(level);
}

void loop() {
  Blynk.run();
  medicine();
}

void medicine() {
  // Read the button state directly
  bool reading = digitalRead(button);

  // Check if the button is pressed
  if (reading == LOW && lastButtonState == HIGH) {
    // Button pressed, dispense medicine
    if (level >= dispense) {
      medicineserve.write(90);  // Open servo
      delay(1000);
      medicineserve.write(0);   // Close servo
      level -= dispense;

      // Update Blynk and LCD
      Blynk.virtualWrite(V0, level);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Medicine Level:");
      lcd.setCursor(0, 1);
      lcd.print(level);

      // LED and buzzer feedback
      digitalWrite(led, HIGH);
      tone(buzz, 1000);  // Play tone at 1000 Hz
      delay(200);
      noTone(buzz);
      digitalWrite(led, LOW);
    } else {
      // Alert for low medicine level
      Blynk.logEvent("ALERT!", "Medicine level too low");
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Medicine Level:");
      lcd.setCursor(0, 1);
      lcd.print("Too Low");
    }
  }

  lastButtonState = reading;  // Save the state for next loop
}